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P0304

P0304 - Cylinder 4 Misfire Detected

Possible causes
- Faulty spark plug 4
- Clogged or faulty fuel injector 4
- Faulty ignition coil 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
- Ignition coil 4 harness is open or shorted
- Ignition coil 4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak
Tech notes
The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4. If the problem persist more tests needs to be done to diagnose problem, see "Possible Causes"
When is the code detected?
Engine Cylinder 4 is Misfiring.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
P0304 Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.
P0304 For specific makes
P0304 BMW
P0304 CHRYSLER
P0304 DODGE
P0304 JEEP
P0304 HONDA
P0304 ACURA
P0304 HYUNDAI
P0304 NISSAN
P0304 INFINITI
P0304 ISUZU
P0304 KIA
P0304 LEXUS
P0304 TOYOTA
P0304 SCION
P0304 MAZDA
P0304 MITSUBISHI
P0304 SUBARU
P0304 VOLKSWAGEN
P0304 AUDI
P0304 GMC
P0304 CHEVROLET
P0304 PONTIAC
P0304 FORD
P0304 BUICK
P0304 CADILLAC
P0304 SATURN
P0304 MERCURY
P0304 1999 MERCURY VILLAGER
P0304 VOLVO
P0304 HUMMER
P0304 JAGUAR
P0304 2002 NISSAN ALTIMA SEDAN
P0304 2003 NISSAN ALTIMA SEDAN
P0304 2004 NISSAN ALTIMA SEDAN
P0304 2005 NISSAN ALTIMA SEDAN
P0304 2006 NISSAN ALTIMA SEDAN
P0304 2002 NISSAN SENTRA
P0304 2003 NISSAN SENTRA
P0304 2004 NISSAN SENTRA
P0304 2005 NISSAN SENTRA
P0304 2006 NISSAN SENTRA
P0304 MERCEDES-BENZ
P0304 2003 INFINITI G35
P0304 2004 INFINITI G35
P0304 2005 INFINITI G35
P0304 2006 INFINITI G35
P0304 2005 SCION XB
P0304 2007 SCION XB
P0304 2006 SCION XB
P0304 1997 TOYOTA CAMRY
P0304 1998 TOYOTA CAMRY
P0304 1999 TOYOTA CAMRY
P0304 2000 TOYOTA CAMRY
P0304 2001 TOYOTA CAMRY
P0304 2000 TOYOTA ECHO
P0304 2001 TOYOTA ECHO
P0304 2002 TOYOTA ECHO
P0304 2004 NISSAN MAXIMA
P0304 2005 NISSAN MAXIMA
P0304 2006 NISSAN MAXIMA
P0304 2007 NISSAN MAXIMA
P0304 2008 NISSAN MAXIMA
P0304 2008 HONDA ACCORD
P0304 2009 HONDA ACCORD
P0304 2010 HONDA ACCORD
P0304 2008 NISSAN ALTIMA SEDAN
P0304 2009 NISSAN ALTIMA SEDAN
P0304 2010 NISSAN ALTIMA SEDAN
P0304 2011 NISSAN ALTIMA SEDAN
P0304 2012 NISSAN ALTIMA SEDAN
P0304 1997 FORD F150
P0304 1998 FORD F150
P0304 1999 FORD F150
P0304 2000 FORD F150
P0304 2001 FORD F150
P0304 2002 FORD F150
P0304 2003 FORD F150
P0304 2001 TOYOTA HIGHLANDER
P0304 2002 TOYOTA HIGHLANDER
P0304 2003 TOYOTA HIGHLANDER
P0304 2004 TOYOTA HIGHLANDER
P0304 2005 TOYOTA HIGHLANDER
P0304 2006 TOYOTA HIGHLANDER
P0304 2007 TOYOTA HIGHLANDER
P0304 2004 TOYOTA PRIUS
P0304 2005 TOYOTA PRIUS
P0304 2006 TOYOTA PRIUS
P0304 2007 TOYOTA PRIUS
P0304 2008 TOYOTA PRIUS
P0304 2009 TOYOTA PRIUS
P0304 2008 NISSAN ROGUE
P0304 2009 NISSAN ROGUE
P0304 2010 NISSAN ROGUE
P0304 2011 NISSAN ROGUE
P0304 2012 NISSAN ROGUE
P0304 2013 NISSAN ROGUE
P0304 1996 HONDA CIVIC
P0304 1997 HONDA CIVIC
P0304 1998 HONDA CIVIC
P0304 1999 HONDA CIVIC
P0304 2000 HONDA CIVIC
P0304 2007 NISSAN SENTRA
P0304 2008 NISSAN SENTRA
P0304 2009 NISSAN SENTRA
P0304 2010 NISSAN SENTRA
P0304 2011 NISSAN SENTRA
P0304 2012 NISSAN SENTRA
P0304 2006 TOYOTA CAMRY
P0304 2007 TOYOTA CAMRY
P0304 2008 TOYOTA CAMRY
P0304 2009 TOYOTA CAMRY
P0304 2010 TOYOTA CAMRY
P0304 2011 TOYOTA CAMRY
P0304 2006 FORD FUSION
P0304 2007 FORD FUSION
P0304 2008 FORD FUSION
P0304 2009 FORD FUSION
P0304 2011 FORD FUSION
P0304 2012 FORD FUSION
P0304 2010 FORD FUSION
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